Botany · 2021

CSS 2021 Botany Paper

7 questions from this paper.

  1. Q1
    Cyanophyta (blue-green algae) is a main group of algae. What is the economic importance of this particular group in food and hunger? Illustrate your answer with examples.
    Past paper Algae 20 marks
  2. Q2
    What are the physiological roles of Cytokinins and Abscisic Acid in plant growth?
    Past paper Plant Physiology 20 marks
  3. Q3
    What is the specificity of enzyme actions? Explain it with reference to the important enzyme 'Ribulose-1, 5-Bisphosphate Carboxylase-Oxygenase' (RuBisCo).
    Past paper Enzymology 20 marks
  4. Q4
    Differentiate between Vascular cambium and cork cambium. Describe their role in secondary growth.
    Past paper Plant Anatomy 20 marks
  5. Q5
    Write a note on cell senescence and cell death.
    Past paper Cell Biology 20 marks
  6. Q6
    How are Gametophyte and Sporophyte evolved in bryophytes?
    Past paper Bryophytes 20 marks
  7. Q7
    Write a note on any TWO of the following: (a) Hardy–Weinberg's law; (b) Evidence of Evolution; (c) Theory of Natural Selection.
    Past paper Genetics and Evolution 20 marks

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